safety:High
failure:Low
noise:Low
noise:Low
failure:Low
power saving:High
power saving:High
maintenance:Low
type:Medium Frequency
safety :High
noise :Low
power saving :High
type :Medium Frequency
power saving :High
noise :Low
efficiency :High
safety :High
type :Medium Frequency
power saving :High
type :Medium Frequency
maintenance :Low
power saving :High
efficiency :High
failure :Low
safety :High
power saving :High
type :Medium Frequency
type :Medium Frequency
power saving :High
failure :Low
maintenance :Low
type :Medium Frequency
power saving :High
noise :Low
power saving :High
efficiency :High